Siemens Sirius 3SU1 Emergency Stop with mushroom head. Pedal pressure and emergency stop button (Electrical Engineering / Push buttons and signal units / Push buttons). Principal data: diameter 40 mm, color Red. Supplied under manufacturer part number 3SU1050-1HQ20-0AA0, EAN 4011209946972, HS code 8538.90, country of origin Germany.